Joe Hoagland, left, pushes a canoe through a wild rice bed as 14-year-old Chris Salazar learns how to harvest the rice. Jim Mone/AP hide caption

itoggle caption Jim Mone/AP

1909. Facing nearly due west from ridge northeast of Como Lake. Light selection cut in open ponderosa pine. Ground cover is comprised of perennial grasses and forbs, including basalmroot. A few low-growing bitterbrush plants can be seen in the vicinity of horses and in distance on left. A group of willows can be seen behind horsemen at left center. Photo 87357/U.S. Forest Service hide caption

itoggle caption Photo 87357/U.S. Forest Service

The U.S. Supreme Court, 70 years after rejecting Roscoe Filburn's bid to limit the federal government's power to regulate commerce. Chip Somodevilla/Getty Images hide caption

itoggle caption Chip Somodevilla/Getty Images

Notice how some of these tomatoes have unripe-looking tops? Those "green shoulders" are actually the keys to flavor. pocius/Flickr.com hide caption

itoggle caption pocius/Flickr.com

The barons wanted King John to stop seizing their grain. The fish weirs had to go, too. Wikimedia Commons hide caption

itoggle caption Wikimedia Commons